Answer:
x = (66.50 - 4y) / 3
Step-by-step explanation:
Given that:
Amount had = $70
Change collected = $3.50
Total amount spent = $(70 - 3.50) = $66.50
Total amount used for purchasing prawn and fish:
Kg of fish = 4
Kg of prawn = 3
1 kg prawn will cost, x
If 1 kg of fish = y
(Total amount spent - cost of 4 kg fish) / Number of kg of prawn
($66.50 - 4y) / 3
x = (66.50 - 4y) / 3
Answer:
(-3,-12)
Step-by-step explanation:
Multiply the first equation by three to match the second equations y-term
The y-terms cancel out
Add the x-terms with each other and the terms after the equal sign as well
Divide -57 by 19
Input your x-term (-3) into one of the two first equations and multiply
Either:
Simplify your terms
Divide
:D
Let x be our first number and y be our second number.
The product of the two numbers will be xy.
Now let x be the one that increases by 50% and y be the one that decreases by 50%.
We can represent that by 1.5x and 0.5y, respectively. If you are confused by that, let me explain. If something increases by 50%, it becomes 1.5 times larger. So for x, that means 1.5x.
And if something decreases by 50%, it becomes 0.5 times smaller. So for y, that means 0.5y.
Therefore we have 1.5x and 0.5y. And the product of those two:
(1.5x) * (0.5y) = (3/2)x * (1/2)y = (3/4)xy
So our product is now (3/4)xy.
Comparing this answer to our original product of xy, we see that it is now only 3/4 as much or 75% of what it originally was.
Therefore, the product will DECREASE by 25%.
*DROPS MIC
Answer:
C 70.26 in2
Step-by-step explanation:
6 = D
R = D/2
R = 3
A = 3.14 x 3 x 3
A = 3.14 x 9
A = 28.26
The area of the triangle is
A = 6 x 7
A = 42
So
42 + 28.26
70.26 in2
First, he would multiply 2x + 2y = 6 by 3.
7x - 6y = 8
2x + 2y = 6....multiply by 3
--------------
7x - 6y = 8
6x + 6y = 18 (result of multiplying by 3)
-------------add
13x = 26.......poof...the y's have been eliminated :)
x = 2
